Efficient Quantum Photonic Phase Shift in a Low Q-Factor Regime

Petros Androvitsaneas; Andrew Young; Joseph Lennon; Schneider C.; S. Maier; J. J Hinchcliff; George Atkinson; Edmund Harbord; M. Kamp; S. Hofling; John Rarity; Ruth Oulton

doi:10.1021/acsphotonics.8b01380

Efficient Quantum Photonic Phase Shift in a Low Q-Factor Regime

Petros Androvitsaneas, Andrew Young, Joseph Lennon, Schneider C., S. Maier, J. J Hinchcliff, George Atkinson, Edmund Harbord, M. Kamp, S. Hofling, John Rarity, Ruth Oulton

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

Solid-state quantum emitters have long been recognized as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarization switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations, and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.

Original language	English
Pages (from-to)	429-435
Number of pages	7
Journal	ACS Photonics
Volume	6
Issue number	2
Early online date	11 Jan 2019
DOIs	https://doi.org/10.1021/acsphotonics.8b01380
Publication status	Published - 20 Feb 2019

Research Groups and Themes

Bristol Quantum Information Institute
QETLabs
Photonics and Quantum

Keywords

quantum dot
cavity QED
micropillar cavity

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10.1021/acsphotonics.8b01380

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This is the author accepted manuscript (AAM). The final published version (version of record) is available online via ACS Publications at https://pubs.acs.org/doi/10.1021/acsphotonics.8b01380. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 646 KB

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SPIN SPACE
Oulton, R. (Principal Investigator)
29/06/15 → 30/12/18
Project: Research

Dr Edmund G H Harbord
- edmund.harbordbristol.acuk
- School of Electrical, Electronic and Mechanical Engineering - Senior Lecturer in Quantum Communication Technologies
- QET Labs
Person: Academic , Member
Professor Ruth Oulton
- Ruth.Oultonbristol.acuk
- School of Electrical, Electronic and Mechanical Engineering - Professor of Quantum Photonics
- School of Physics - Professor
- QET Labs
Person: Academic , Member

Cite this

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title = "Efficient Quantum Photonic Phase Shift in a Low Q-Factor Regime",

abstract = "Solid-state quantum emitters have long been recognized as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarization switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations, and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.",

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T1 - Efficient Quantum Photonic Phase Shift in a Low Q-Factor Regime

AU - Androvitsaneas, Petros

AU - Young, Andrew

AU - Lennon, Joseph

AU - C., Schneider

AU - Maier, S.

AU - Hinchcliff, J. J

AU - Atkinson, George

AU - Harbord, Edmund

AU - Kamp, M.

AU - Hofling, S.

AU - Rarity, John

AU - Oulton, Ruth

PY - 2019/2/20

Y1 - 2019/2/20

N2 - Solid-state quantum emitters have long been recognized as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarization switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations, and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.

AB - Solid-state quantum emitters have long been recognized as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarization switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations, and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.

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KW - cavity QED

KW - micropillar cavity

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DO - 10.1021/acsphotonics.8b01380

M3 - Article (Academic Journal)

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EP - 435

JO - ACS Photonics

JF - ACS Photonics

IS - 2

ER -

Efficient Quantum Photonic Phase Shift in a Low Q-Factor Regime

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Dr Edmund G H Harbord

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